Screening-conveyer.



U. WEDGE.

SCREENING GONVEYER.

APPLICATION FILED HAY 12,1908.

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Patented 0011.25, 1910.

U.l WEDGrE.

SCREENING GONVEYER.

APPLIoATIoN FILED MAY 12.1908.

Patented 0013.25, 1910.

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UNITED sTATEs PATENT oEErcE.

UTIAEY WEDGE,`OF 'ARDMORE PENNSYLVANIA.

Specification of LetterslPatent.

'PateItedOct 25, 1910.

.To allwhomttrmag/:concern: r

Be. it known thattLUTLEY .VEDGma citimore, ,.i-Pennsylvania, have invented certain @Improvements in rScreening-Gonveyers, of

which A the following is a specification.

Theobject offmy invention4isto1provide a screening vconveyer possessingqualities .of strength and durability which willadaptit for use inthe` screening and conveyingfof ores and other roughand heavyrmaterial, the conveyor v,being Aalso constructed with speciallret'erence to preventing clog-ging of the screening surface.

4In the accompanying drawings Figure 1 is (atop or planzview of a screening conveyer constructed in accordance withmyinvention;Fig. 2 is aside elevation of the same; Fig. 8 is a transverse section, on the line ca a, Fig.' 2; Fig. 4 isa lside elevation, on an enlarged-scale, of part of theA screeningvand conveying member of the machine; Fig. 5 is atransverse section of part of a modified form of the conveyer, and Fig.v 6 isa side elevation of part of. one of the members of the same.

The frame of the conveyer consists of a pair of oppositely disposed longitudinal beams 1, suitably supported and laterally braced, these beams carrying bearings for a series of shafts 2, 3, 4t and 5, the shaft Q being the driving shaft of the machine and having power applied to it in any convenient way in order to effect its rotation in the direction of the arrow, Fig. 2.

The shaft 2 carries a pair of sprocketwheels 6 properly spaced and serving to impart movement to a pair of endless chains 7, preferably of the detachable link type, these chains being connected by transverse bars 9 suitably secured at their opposite ends to corresponding links of the chains, this result being attained in the present instance by providing each link with a flange 10 to which the bar 9 is rigidly bolted. (See Fig. 4t.)

A conveyer of greater capacity may have more than two chains, each with corresponding sprocket Wheel on the shaft 2, or the conveyer may have but a single central chain, as shown in Fig. 5, the outer ends of the bars 9 being supported upon bars 9a, which may be of such conformation (see Fig. 6) as to permit any desired sag of the upper run of the conveyer.

The shaft 8 carries a drum 11, at the ends of which are located sprocket wheels for en- ,gagementavithf the chains J7 and 'said :shaft is adapted :to :bearings :12, which .are =,.ad]ust .able longitudinally in Aguides 13 mounted upon the beams lfsuch `adjustment :being eected byzmeans of n.screws .-let'whieh are .provided .with c handles 14a, f have swivel connection with the-gbearingsilQ and areadapt.- ed to1nuts-15 securedito or zforming part of the. outergportions of: the guide structures E 13, asashown in f1.

The intermediate shafts 4 and 5,;.areat`a higher level thanfthe end shafts 2.and 3, and :said:shafts-fl` and 5 '.are;provide.d with 'sheaves ,161.for l-'supportingthe upperruns.; of theendless chains 7. l.The ychains and their connecting bars-9 thusrformga combined conveyer ;and,.screen,.since, ifa miXtu-recomprising large and small lumps is.dumped upon the upper run of the conveyer,. say at orfaboutt-he point Aa in 1Fig.;2, vsaid mixture will be carried forwardly by. the `upper Vrun ofthey conveye-r and duringits passagethe smallerI lumps Will2 pass. throughf the y .spaces between the. bars --9, only ict-he .larger Vlumps remaining upon thesurface of-theconveyer and. being delivered at the point wherel said conveyer passesaround the drum 11.

The finer lumps, after passing through the upper run of the conveyer, fall upon:k a deiector 17 of inverted V-shape, located between the upper and lower runs of the conveyer and supported upon vertical bars 19, which are mounted by means of brackets 2O upon the longitudinal beams 1 of the frame, the upper ends of said bars 19 carry'- ing guard plates or shields 21, which extend longitudinally throughout the upper run of the conveyer, outside of, but comparatively close to, the ends of the bars 9, in order to insure the lateral confinement of the mass of material under treatment within the limits of said upper run of the conveyer. The deiiector 17 discharges the ner lumps falling thereupon into any suitable receptacle located below it.

Any lumps passing through the upper run of the screen when it is approaching the delivery end of the conveyer, will strike the drum 11, and will be directed thereby onto the deflector 17, and thus prevented from falling onto the inner side of the lower run of the conveyer, where they would otherwise accumula-te and interfere with the operation of the conveyer. r

As the driving shaft is at the rear or receiving end of the conveyer, the lower run of the latter is under tension and is drawn tight, while the upper run is slack, and the drum-carrying shaft 3 can be so adjusted in respect to the driving shaft 2 of the machine that said upper run of the conveyer may have any desired degree of slack and will therefore sag between the supporting sheaves 16 and between the latter and the sprocket wheels 6 or drum l1, the result being that the bars 9 are continually changing their positions in respect to one another, so as to work out from between them lodged lumps approximating in size to the Width of the spaces between the bars, thereby lpreventing these lumps from being caught and held between successive bars, where they would eventually clog the conveyer and prevent or interfere with the proper performance of its intended separating function. a

By adjusting the bearings which carry the drum shaft 3, the amount of slack in the upper run of the conveyer may be regulated so as to best insure the performance of its self-cleaning function in connection with the particular kind of material which is being` acted upon.

I claim:

l. The combination, in a screening conveyer, of one or more endless chains, spaced and upstanding transverse bars vcarried thereby, and so disposed that the bars of the upper run of the conveyer` constitute the sole supporting, screening and conveying means for the material under treatment,

supporting and operating means for the chains, and a deiector interposed between the upper and lower runs of the conveyer.

2. The combination, in a screening conveyer, of one or more endless chains, spaced and upstanding transverse bars carried thereby, and so disposed that the bars of the upper run of the conveyer constitute the sole supporting, screening and conveying means for the material under treatment, supporting and driving means for the chains so disposed that the upper run of the conveyer is caused to sag between its supports, and a delector interposed between the upper and lower runs of the conveyer.

3. The combination, in a screening conveyer, of one or more endless chains, spaced and upstanding transverse bars carried thereby and so disposed that the upper run of the conveyer constitutes the sole supporting, screening and conveying means for the material under treatment, support-ing and driving means for the chains at the ends of the conveyer, and intermediate supporting devices for the upper run of the conveyer so disposed that said upper run of the conveyer is caused to follow an undulating course.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

UTLEY WEDGE.

Witnesses HAMILTON D. TURNER, KATE A. BEADLE. 

